报告人：杨阳
报告时间：2018年12月14日（星期五）上午10:00开始
报告地点：校本部教一楼101教室
报告人简介：
杨阳教授于2010年毕业于清华大学材料科学与工程系。2010年获得洪堡奖学金，2010年至2012在德国纽伦堡大学从事洪堡学者研究。2012年获得美国斯莫里奖学金，2012年至2015年在美国莱斯大学从事科学研究。2015年至今就职于美国中佛罗里达大学材料科学与工程系任助理教授。
研究领域和成果：
（1）纳米薄膜材料的制备及应用，金属空气天池，光、电催化等。
（2）新能源电池，锂离子电池、锂硫电池等。
（3）柔性电子学及器件研究。
以第一作者和通讯作者发表论文逾90篇（其中top期刊（IF=10以上）20余篇，被引用5000余次，主要代表作见列表），H因子31，已申请及授权专利8项，并荣获皇家化学学会Journalof Materials Chemistry杂志评选的2018年度杰出科学家称号及2018年度 ScialogFellow。
报告摘要：
Understanding the synergism of bimetallic transition metal (TM)-based catalystsfor oxygen evolution reaction (OER) is very difficult because it is complicatedto identify the surface active sites in abi-metal system. Herein, we rationally designed Cu oxide (CuOx)nanoarray film (NF) as an example to investigatethe synergism and doping effects of iron group metals on OER. It is because CuOxis electrocatalytically inert and oxidatively stable, which is much better thancarbon-based platforms. Especially, cobalt (Co) shows a much stronger synergismas compared to nickel (Ni) and iron (Fe). By introducing Co into the inert CuOxNFs, the Co active sites can becorrelated to the OER activity by rationally regulating the morphology of CuOxNFs. In addition, the phasetransformation from Cu2O to CuO occursduring the OER testing, further boosting the OER activity of Co-doped CuOxNF due to the hybridization change of Co activesite. As a result, the Co-doped CuOx NF with 0.30 at.% Co (denotedas Co0.30CuOx) shows a remarkable OER activity (anoverpotential of 0.29 V at 10 mA cm-2) in basic solution, superiorto the state-of-the-art OER catalysts. Both experimental and computationalstudies indicate that the introduction of Co-dopant in CuOx changesthe rate-limiting step from M-OHads→ M-Oads to M-Oads→ M-OOHads and decreases the theoretical onset potential by0.31 V. The optimal concentration of Co-dopant in CuOx nanocrystalsrenders the favorable surface properties for the electron transfer, theadsorption, and desorption ofOER-relevant intermediates. Moreover, the small size of CuOxnanocrystals contributes to the large electrochemically active surface area,which sufficiently exposes the Co active sites to the electrolyte.
